Extruding die



March 15, 1932. w. H. MAYHEW EXTRUDING DI E Filed Dec. 19, 1929 2 Sheets-Sheet 1 Hail flEE

March 15, 1932) M YHE 1,849,431

EXTRUDING DIE Filed Dec. 19, 1929 2 Sheets-Sheet 2 Fin-:5-

um/wt mien/ f. 262772210- Wi tmwo Yea aflomup Patented Mar. 15, 1932 ms-o STATES HERBERT mYnEw, or rononro, OHIO Exm nme 7 Application filed Decenibr 19,1929; enm'm41sz6a;

proved construction, in which the h'ol'dback may be readily adjusted inwardly or outwardly as may be required, by the manip'ulati'on of adjustingmeansaccessible at the exterioro f thedie, 1

Dies of the type with which-the present in vention'deals, include aplurality of spaced bells mounted on longitudinal stems which are" secured to bridges spanning the die side wallgthe bells being ofnon circular'sh'ape corresponding to the Sha eoftheVar'iOuS-passages to be formed in the conduit. Wh'ile rather e'flec'tive provision has been made in the past-for'securing 'the'stems' to the bridges,

saidstems nevertheless often tum about-their longitudinal axes, throwing the bells out of pro er position and cau'sing'the production of faulty conduits; It'is a further object'of my invention to'provide unique means to compensate for any such turning of the "stems-by allowing a corresponding reverse turning of the bells'upon the stems, the construction being such that thisrectifying'adjustmentmay be efl'ected from the exterior of the die without disassembling any parts. i

With the foregoin 1n -view,the invention resides in the novel su ject matter hereinafter described and claimed, description being accompl-ishedby reference to the a'ccompanying drawings V Fig. 1 is a verticaltransv'ers'e sectional view through an, extruding die constructedin accordancewith' my invention; l

for preventing flow of the clay more Fig '2 is' av top planview paiflytroken away; V Figi-3is a-bottom planview, Fig. 4' is a perspective of one of the hold-- backbars. 3 v I The drawings aboveibriefly described illustrate the preferred form of construction, and While such construction wi'll be herein specifically explained,- it is to be understood that within the scope of the invention as claimed, variations may heme-(1e, a V

extruding diejis -shownembodying a; continuous side wall, consisting of a main.

longitudinally tapered section 6 and a'mouth ring 7 secured thereto", the two'wall sections 67 being securedtogether in edge-to-edge relation; PreferabIyQthe ring 7 is provided withoutsta'nding lugs 8 contacting with the outer 'end of the main wall section-6, cap screws '9 being'passed throughi'theselugs and threadedainto'said'waill section 6. Theinner;

edge of the ring 7 ispr'ovided with a stepped formation as indicated at 10, providings continuousinternalgroove 1 1. 'Slidably re, ceived; in this groove, are hold-back bars 1 2 corresponding in number to the sides of i the diewallL Adjustingscrews 1 3 have their inner endsswiveled at 1 4 to'the bars 12, said screws bein in the IIlOlit?! ring'Z; Theout'er end's of the screws-1 3areabcessibleat the exteriorof the die, and-by turningthe'se scr'ewsin the proper directiomthe-ho1d back bars 12'ma 'y be ad-' justed inwardly or outwardly to insure the proper amount-of projection from the: die side wall, according to the character of the clay or the like being extruded, the pressure behind theclay, etc. As usual,t'heclay' is containedin a; hydraulicpress, to the outlet of which the die is secured, the inner end of the m'a'in Wall section -6' being provided with an outstanding flange 16 for attaching purposes.- i

A number of bridge hers" 17 spanthein'ner' end of the die 5 side wall and are secured to threaded through openings "15 d v vision is made.

its properly set position.

the section 6 by cap screws or the like 18, the press-facing edges of said bars being preferably thinned as at 19,'to offer little resistance to the clay forced outwardly from the press. The bridge bars 17 are formed with openings 20 in which integral studs 21 on the upper end of bell-carrying stems 22 are threaded, locking screws 23 being also threaded into said openings to lock the stems 22 against rotation insofar as possible. Hegardless of the stem-locking means such as 23 however, the, stems 22 often turn somewhat about their longitudinal axes, and hence move the bells 24 out of their proper positions. To compensate for this, novel pro- The outer end of each stem 22 is provided with an enlarged head 25 having a central recess 26 which opens through its, outer ex- I tremity. The bell 24 rotatably surrounds the outer endportion ofthe stem 22 and is recessed to receive the head 25, and a setscrew 27 is provided-for normally holding the bell 24 against rotation upon the stem 22. v This set screw is threaded outwardly through the wall of therecess 26, has itsouter end in con tact with the bell and has itshead exposed for operation within therec'ess26. In case any stem22. and its bell24 should turn'about the longitudinal axis-of the stenn the set screw 27 may be loosened, the bell 24 restored to its original position, and said screw again tightened, thereby holding the bell which was previously out of adjustment,iback As usual, the mouth ring 7,and the bells 24 are disposed in proper spaced relation so that the clay extruded through the spaces between them, will constitute'the sides and the dividers of the tile; or conduit. .The hold-back bars 12 mayv beiadjusted as may be necessary without the necessity of dis-v assembling anypartsof the die or the hydraulic-press, and any time oneor'more of the bells 24 may rotate to improper position,

theymay be restored to their original relation and again locked. vThisreeadjustment may alsobe effected from the exterior of the the die without the necessity of totallyor partially disconnecting any parts. 7

I Itwill be seen from the foregoing that novel provision has been made for carrying out the objects of the invention, in an ad vantageous manner, and attention is again invited tothe fact that withinthe scope of the invention as claimed, variations may be made. I 4

1. Inan extruding die, acontinuous side wall, a substantially.continuous hold back projecting inwardly from said wall between the. inletand outlet ends ofthe latter, and means for adjusting said hold-back inwardly OroutWardly tovary the amount which it projects from said sidewall, said meansbeing.

, terior of the die.

accessible for operation at the outer circumference of said continuous wall.

2. In an extruding die, a continuous side wall having a continuous groove-extending throughout its inner circumference and open- 7' in gs from said groove tothe outer circumfer-.

ence of the wall, hold-back bars slidably received in said groove, and adjusting screws threaded through said openings and having swivel connections with said hold-back bars for adjusting the latter inwardly or outwardly, said screws being adjustable from the ex- 4. In an extruding die, aside wall embodying a main continuous sectionvand-a-;mou th ring section secured to said main sectionin edge-to-edge-relation therewith, one of said sections having a stepped formation at its inner edge coacting with the other sectionin providing an internal groove,osaid one section being formed with openings from said groove to its outer side, hold-back barsslide ably received in said groove, and adjusting screws threaded through said openings and having swivel connections with saidholdback bars foradjusting the latter inwardly or outwardly, said screws being adjustable from theexteriorofthe die. V I

5. In anextruding die,.a continuou'sfside wall, a bridge spanning the same, a stem, means securing said stem to said bridge, said stem being capable .of accidental turning about its longitudinal. axis, a bell rotatably mounted on the free end of said stem, and releasable meansindependent of said stem see curing means for normally holding said bell against turning on the stem, release of said means allowing bell-turning if necessary to compensate for accidental turning of the stem, the free end of said stem being surrounded by said bell and having a recess, said releasable means consisting; of; a setscrew threaded outwardly through the wall of said recess and abutting said bell,the headof the screw being-accessiblewithin said recess.v I 6'. In an extruding die, a continuous side. wall, a bridge spanning the same, a stem, means securing said stemto said bridge, said stem being capable of accidental turning about its longitudinal axis, a bell rotatably mounted on the free vend of said stem, and

releasable means independent of said stem securing mea-ns for normally holdingsaid bell against turning on the stem, release of said means allowingbell-turningifnecessary to compensate for accidental turning of the stem, the free end of said stem having an enlarged integral head received in said bell, said head having a recess opening through its outer extremity, said releasable means consisting of a set screw threaded outwardly through the wall of said recess and abutting said bell, the head of the screw being accessible within said recess.

In testimony whereof I have hereunto af fixed my signature.

WALTER HERBERT MAYHEW. 

